The Simulation And Experimental Research On Cutting Performance Of Micro-textured Tool Under Different Cutting Conditions

Laser surface texturing technique applied in the friction surface has been the focus of research direction. Recently, for the complex friction condition between tool and chip in cutting processing, researchers applied the micro-texture in tool-chip contact region, which can improve frictional state and cutting performance effectively. This paper employed the micro-groove texturing and concave-convex texturing on the tool surface, studied the cutting performance of different textured tools by simulation and experiment under different cutting conditions. The main research contents are as follows.Firstly, based on the theory of metal cutting and cutting simulation analysis, the simulations were carried out. The main result can be listed as follows: compared with non-textured tool, the micro-groove textured tool and micro-convex textured tool can disperse the stress concentration,reduce the cutting temperature and improve chip curling. However, the secondary-cutting phenomenon of micro-groove textured tool, increasing the chip surface roughness, is obvious in rough finish. The micro-convex textured tool increases the cutting force in precision machining,but effectively reduces cutting force in rough finish.Secondly, to get the best texture morphology, it is necessary to match laser parameters and textured geometric parameters. The process tests of micro-groove texture and micro-convex texture were carried out on the basis of previous studies. As for micro-groove texture, The tests got the effect of pump current and scanning speed on the groove width and depth. As for micro-convex texture, the effect of pulse width and output power on the convex diameter and height was discussed. Finally, the optimistic laser processing parameters could be found, and the textured tools were machined.At last, the cutting performance of micro-groove textured tools and micro-convex texture tools were analyzed by cutting tests. Compared with non-textured tool and found: under the condition of wet and rough machining, the micro-groove textured tool has the best cutting performance, which can reduce the sticking area, increase the chip curling, lower the wear depth of tool rake face, decrease the size of machining burrs and so on. But it appears tearing at the bottom of chip, which was caused by the secondary-cutting of micro-groove and make the chipsurface more rough. The micro-convex textured tools have the best result in reducing the length of sticking area and increasing chip curling. Under the condition of rough and dry machining, it shows the minimal cutting force. Besides,with the influence of micro-convex texture, the size of a single cutting burr enlarges and the density of cutting burrs decreases.